/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied. See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package thrift;

import java.util.HashMap;

public class CalculatorHandler implements Calculator.Iface {

	private HashMap<Integer, SharedStruct> log;

	public CalculatorHandler() {
		log = new HashMap<Integer, SharedStruct>();
	}

	public void ping() {
		System.out.println("ping()");
	}

	public int add(int n1, int n2) {
		System.out.println("add(" + n1 + "," + n2 + ")");
		return n1 + n2;
	}

	public int calculate(int logid, Work work) throws InvalidOperation {
		System.out.println("calculate(" + logid + ", {" + work.op + ","
				+ work.num1 + "," + work.num2 + "})");
		int val = 0;
		switch (work.op) {
		case ADD:
			val = work.num1 + work.num2;
			break;
		case SUBTRACT:
			val = work.num1 - work.num2;
			break;
		case MULTIPLY:
			val = work.num1 * work.num2;
			break;
		case DIVIDE:
			if (work.num2 == 0) {
				InvalidOperation io = new InvalidOperation();
				io.what = work.op.getValue();
				io.why = "Cannot divide by 0";
				throw io;
			}
			val = work.num1 / work.num2;
			break;
		default:
			InvalidOperation io = new InvalidOperation();
			io.what = work.op.getValue();
			io.why = "Unknown operation";
			throw io;
		}

		SharedStruct entry = new SharedStruct();
		entry.key = logid;
		entry.value = Integer.toString(val);
		log.put(logid, entry);

		return val;
	}

	public SharedStruct getStruct(int key) {
		System.out.println("getStruct(" + key + ")");
		return log.get(key);
	}

	public void zip() {
		System.out.println("zip()");
	}

}
